Scientists use meteorites that hit Earth to gather evidence about the composition of our planet and its interior because these extraterrestrial rocks are believed to be remnants of the early solar system. By studying their mineralogy and isotopic compositions, researchers can infer the primordial materials that formed Earth. This comparison helps to hypothesize about the processes that shaped our planet's formation and evolution, as well as the differentiation of its core, mantle, and crust. Ultimately, meteorites serve as a window into the conditions and materials present during the solar system's formation.
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